package com.bwie.filter;

import io.jsonwebtoken.Jwts;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.annotation.Order;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.http.HttpStatus;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

import java.util.concurrent.TimeUnit;

/**
 * @Author: Wrj
 * @Date: 2025/4/23 18:18
 * @Description:
 **/
@Configuration
@Order(1)
public class MyGlobalFilter implements GlobalFilter {


    @Autowired
    StringRedisTemplate redisTemplate;
    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {

        //获取参数
        ServerHttpRequest request = exchange.getRequest();
        ServerHttpResponse response = exchange.getResponse();
        String url = request.getURI().getPath();
        System.out.println("请求路径:"+url);
        //白名单

        if (url.contains("/adminlogin")){
            System.out.println("登录白名单:"+url);
            return chain.filter(exchange);
        }
        if (url.contains("/userReg")){
            System.out.println("注册白名单:"+url);
            return chain.filter(exchange);
        }

        //验证token
        String token = request.getHeaders().getFirst("token");
        if (token==null || token.isEmpty()){
            System.out.println("token为空:"+url);
            response.setStatusCode(HttpStatus.UNAUTHORIZED);
            return response.setComplete();
        }

        Integer userId = Jwts.parser().setSigningKey("123456").parseClaimsJws(token).getBody().get("userId", Integer.class);


        String redisKey = "token-" + userId;
        String redistoken = redisTemplate.opsForValue().get(redisKey);


        if (redistoken==null || redistoken.isEmpty()){
            System.out.println("token已经过期:"+url);
            response.setStatusCode(HttpStatus.UNAUTHORIZED);
            return response.setComplete();
        }
        if (!token.equals(redistoken)){
            System.out.println("token错误:"+url);
            response.setStatusCode(HttpStatus.UNAUTHORIZED);
            return response.setComplete();
        }

        //续期token

        redisTemplate.expire(redisKey,60, TimeUnit.MINUTES);

        //放行
        System.out.println("放行:"+url);
        return chain.filter(exchange);
    }
}
